Copyright Registration Lookup

U.S. Copyright Office & Mechanical Licensing Collective — consolidated ownership lookup

Look up a registration

Enter a U.S. Copyright Office registration number. The CPRS record is authoritative; the MLC publishing data is a title-based match you confirm below.

Registration number

Publisher	Role	IPI	Administrator	Collection share
Total

Batch lookup

Upload a CSV of registration numbers (optional writer_last_name column). Each registration is looked up against CPRS and the MLC; rows that need a human review are flagged.

Drop a CSV here or click to browse

registration_number column required; writer_last_name optional.

Need the format? Download CSV template

Reg #	Title	Claimants	MLC match	Confidence	Publisher	Share

Saved searches

Every confirmed match (or explicit "none") from the single-lookup flow is saved here, scoped to your account. Reopening one restores the CPRS record, the MLC candidates shown, and the confirmed choice.

Reg #	Title	Result	Confidence	Saved

Actions: Open reopens the interactive view; Export downloads Excel directly; Delete removes it permanently.

Look up a registration

Search the MLC for publishing splits

Confirm the matching work

Batch lookup

Processing

Saved searches